@kaia Nope, they are not that same. Signal from the reset button goes almost directly to the mainboard's vrm section, bypassing any logic on the mobo. That's an low-level signal. All you do on/with the keyboard goes trough the kbc chip, and also trough the other logical elements like hub, bridge, controllers etc., where is "converted" to an acpi/apic command which can be interpreted/understand by mobo's logic - mostly bios and kbc/smb. So is done since the beginning of the ATX standard era.